How to Add Auxiliary LED Light Bars on Jeep Cherokee XJ

Proper wiring separates a reliable setup from a frustrating one. Every auxiliary light installation requires a relay and a fuse to protect your vehicle’s electrical system. The relay acts as a switch: a small trigger current from your dashboard switch activates the relay, which then sends full battery power directly to the lights through a thick-gauge wire . This prevents the switch itself from handling high current, which would melt it over time. Here is the standard wiring sequence: disconnect the negative battery terminal, mount the relay near the battery, run the positive lead to the battery through an inline fuse, ground the negative lead to the chassis, route the switch wire through the firewall into the cabin, and connect everything . Use zip ties to secure all wiring away from exhaust components, moving suspension parts, and sharp edges .
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